/**
 * base.css — Единая база стилей и UI-примитивов «ТОЧКА ПЛАВЛЕНИЯ» (Editorial Lab)
 *
 * Содержит:
 * - Сбросы и базовые стили тела страницы
 * - Универсальные UI-компоненты: .btn, .card, .field, .badge, .alert
 * - Логотип, шапку, мобильную панель и модальное окно поиска
 * - Инженерную эстетику (скетч-пилюли, скотч, маркеры, заметки)
 * - Стили печати
 */

@import url('tokens.css');

/* ==========================================================================
   1. СБРОС И БАЗОВАЯ СТРУКТУРА
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  overflow-x: clip;
}

:focus-visible {
  outline: 2px solid var(--color-accent) !important;
  outline-offset: 2px !important;
}

body {
  background-color: var(--color-bg);
  background-image: radial-gradient(var(--dot-color) 0.9px, transparent 0.9px);
  background-size: 20px 20px;
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.2s ease, color 0.2s ease;
}

::selection {
  background-color: #fef08a;
  color: #141414;
}

/* ==========================================================================
   2. УНИВЕРСАЛЬНЫЙ UI-KIT (ПРИМИТИВЫ)
   ========================================================================== */

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--touch-target-min);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  transition: opacity 0.15s ease, transform 0.1s ease, background-color 0.15s ease;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--touch-target-min, 48px);
  background-color: var(--color-accent);
  color: #ffffff !important;
  border-radius: var(--radius-md);
  padding: 0.7rem 1.6rem;
  font-weight: 700;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  border: 1px solid var(--color-accent-hover);
  box-shadow: 0 1px 3px rgba(185, 67, 13, 0.25);
  cursor: pointer;
  text-decoration: none;
}
.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(185, 67, 13, 0.35);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 2px rgba(185, 67, 13, 0.2);
}

html.dark .btn-primary {
  border-color: rgba(255, 107, 43, 0.6);
  box-shadow: 0 1px 4px rgba(255, 107, 43, 0.2);
}
html.dark .btn-primary:hover {
  box-shadow: 0 4px 12px rgba(255, 107, 43, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--touch-target-min);
  background-color: var(--color-paper-subtle);
  color: var(--color-ink) !important;
  border-radius: var(--radius-md);
  padding: 0.5rem 1.25rem;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  border: 1px solid var(--color-paper-border-dark);
  cursor: pointer;
  text-decoration: none;
}
.btn-secondary:hover {
  background-color: var(--color-paper-border);
  border-color: var(--color-ink-muted);
}

/* Карточки */
.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.card-tool {
  background-color: var(--color-card);
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

/* Поля ввода и селекторы */
.field,
.input-base {
  width: 100%;
  min-height: var(--touch-target-min);
  padding: 0.625rem 0.75rem;
  background-color: var(--color-paper);
  border: 1px solid var(--color-paper-border-dark);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field:focus-visible,
.input-base:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}
.field.has-error,
.input-base.has-error {
  border-color: var(--color-danger);
}

/* Бейджи */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.025em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.badge.badge-neutral {
  background-color: var(--color-paper-subtle);
  color: var(--color-ink-muted);
  border: 1px solid var(--color-paper-border);
}
.badge-level-beginner,
.badge-beginner {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success-border);
}
.badge-level-practice,
.badge-practice {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning-border);
}
.badge-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid var(--color-danger-border);
}

/* Tag Pills — Инженерная разметка категорий и параметров */
.pill-orange {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-border);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
}
.pill-blue {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-paper-subtle);
  border: 1px solid var(--color-paper-border-dark);
  color: var(--color-ink-muted);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
}
.pill-yellow {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  color: var(--color-warning);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
}

/* Сообщения и предупреждения */
.alert,
.alert-box {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.875rem;
  line-height: 1.5;
  border-left: 4px solid;
}
.alert-warning {
  background-color: var(--color-warning-bg);
  border-left-color: var(--color-warning);
  color: var(--color-ink);
}
.alert-safety,
.alert-error,
.alert-danger {
  background-color: var(--color-danger-bg);
  border-left-color: var(--color-danger);
  color: var(--color-ink);
}
.alert-success {
  background-color: var(--color-success-bg);
  border-left-color: var(--color-success);
  color: var(--color-ink);
}

/* ==========================================================================
   3. ЛОГОТИП И НАВИГАЦИЯ
   ========================================================================== */

.logo {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--color-ink);
  letter-spacing: -0.03em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  line-height: 1;
  transition: opacity 0.15s ease;
}
.logo:hover {
  opacity: 0.85;
}
.logo span {
  color: #141414;
  background: var(--color-accent);
  padding: 0.05rem 0.35rem;
  border-radius: 3px;
  transform: skew(-6deg);
  display: inline-block;
  margin: 0 0.18rem;
  font-size: 1.05em;
  line-height: 0.9;
}

.nav-link {
  transition: color 0.15s ease, background-color 0.15s ease;
}
.nav-link.active {
  color: var(--color-accent) !important;
  border-bottom: 2px solid var(--color-accent) !important;
  background: var(--color-accent-subtle) !important;
  font-weight: 700 !important;
}

/* ==========================================================================
   4. СКЕТЧ-ЭЛЕМЕНТЫ И ИНЖЕНЕРНАЯ ЭСТЕТИКА (EDITORIAL LAB)
   ========================================================================== */

.sketch-border {
  border-radius: 255px 15px 225px / 15px 225px 15px 255px;
}

.sketch-pill-yellow {
  position: relative;
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: #141414;
  padding: 0.22rem 0.75rem 0.26rem 0.7rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 28' preserveAspectRatio='none'%3E%3Cpath d='M1.5 4 C 20 1.5, 68 3, 98 2 C 100 11.5, 98 19.5, 99 25.5 C 72 26.5, 26 24.5, 1 25.5 C 0 16.5, 1.5 8, 1.5 4 Z' fill='%23fef08a' fill-opacity='0.95' stroke='%23ca8a04' stroke-width='0.9' stroke-dasharray='40 1 20 1' stroke-linecap='round'/%3E%3Cpath d='M4 7 C 28 5, 72 5.5, 95.5 5 C 96.5 12, 94.5 18.5, 96 21.5 C 68 22.5, 26 21.5, 3 21.5 Z' fill='%23fde047' fill-opacity='0.65'/%3E%3C/svg%3E");
  background-size: 100% 100%;
  background-repeat: no-repeat;
  transform: rotate(-0.9deg);
  transition: transform 0.15s ease;
}
.sketch-pill-yellow:hover {
  transform: rotate(0deg) scale(1.03);
}
html.dark .sketch-pill-yellow {
  color: #fef08a;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 28' preserveAspectRatio='none'%3E%3Cpath d='M1.5 4 C 20 1.5, 68 3, 98 2 C 100 11.5, 98 19.5, 99 25.5 C 72 26.5, 26 24.5, 1 25.5 C 0 16.5, 1.5 8, 1.5 4 Z' fill='%23ca8a04' fill-opacity='0.4' stroke='%23eab308' stroke-width='0.9' stroke-dasharray='40 1 20 1' stroke-linecap='round'/%3E%3Cpath d='M4 7 C 28 5, 72 5.5, 95.5 5 C 96.5 12, 94.5 18.5, 96 21.5 C 68 22.5, 26 21.5, 3 21.5 Z' fill='%23a16207' fill-opacity='0.4'/%3E%3C/svg%3E");
}

.sketch-pill-gray {
  position: relative;
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: var(--color-ink);
  padding: 0.22rem 0.75rem 0.26rem 0.7rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 28' preserveAspectRatio='none'%3E%3Cpath d='M1.5 3 C 22 1.5, 62 4, 98 2 C 99.5 11.5, 98 19.5, 99 25.5 C 70 26.5, 25 24.5, 1 25.5 C 0.5 17, 0 8.5, 1.5 3 Z' fill='%23e9e5dc' fill-opacity='0.95' stroke='%23b8b1a2' stroke-width='0.9' stroke-dasharray='35 1 25 1' stroke-linecap='round'/%3E%3Cpath d='M4 6.5 C 30 5, 75 5.5, 95 4.5 C 96 12, 95 18, 96 22 C 68 23, 30 21.5, 3 22 Z' fill='%23ded8cd' fill-opacity='0.6'/%3E%3C/svg%3E");
  background-size: 100% 100%;
  background-repeat: no-repeat;
  transform: rotate(0.6deg);
  transition: transform 0.15s ease;
}
.sketch-pill-gray:hover {
  transform: rotate(0deg) scale(1.03);
}
html.dark .sketch-pill-gray {
  color: #f3f4f6;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 28' preserveAspectRatio='none'%3E%3Cpath d='M1.5 3 C 22 1.5, 62 4, 98 2 C 99.5 11.5, 98 19.5, 99 25.5 C 70 26.5, 25 24.5, 1 25.5 C 0.5 17, 0 8.5, 1.5 3 Z' fill='%23222735' fill-opacity='0.95' stroke='%233e465c' stroke-width='0.9' stroke-dasharray='35 1 25 1' stroke-linecap='round'/%3E%3Cpath d='M4 6.5 C 30 5, 75 5.5, 95 4.5 C 96 12, 95 18, 96 22 C 68 23, 30 21.5, 3 22 Z' fill='%232c3346' fill-opacity='0.6'/%3E%3C/svg%3E");
}

/* Скрытие переключателя темы в шапке на смартфонах (доступен в нижнем баре навигации) */
@media (max-width: 768px) {
  #theme-toggle {
    display: none !important;
  }
}

/* Скетч-маркеры текста */
mark, .marker-yellow {
  position: relative;
  display: inline;
  background: transparent;
  color: #141414;
  padding: 0.18em 0.55em 0.22em 0.5em;
  margin: 0 -0.15em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 24' preserveAspectRatio='none'%3E%3Cpath d='M0.5 4.5 C 18 2, 48 5.5, 98.5 2.5 C 100 11, 98 18.5, 99.5 22 C 75 23.5, 30 20.5, 1.5 22 C 0 16, 1.5 8.5, 0.5 4.5 Z' fill='%23fef08a' fill-opacity='0.9'/%3E%3Cpath d='M3 7.5 C 25 5.5, 68 6, 96.5 5 C 97.5 12.5, 95 18, 97 20 C 70 21.5, 28 19.5, 4 19.5 Z' fill='%23fde047' fill-opacity='0.55'/%3E%3C/svg%3E");
  background-size: 100% 100%;
  background-repeat: no-repeat;
  font-weight: 600;
}
html.dark mark, html.dark .marker-yellow {
  color: #fef08a;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 24' preserveAspectRatio='none'%3E%3Cpath d='M0.5 4.5 C 18 2, 48 5.5, 98.5 2.5 C 100 11, 98 18.5, 99.5 22 C 75 23.5, 30 20.5, 1.5 22 C 0 16, 1.5 8.5, 0.5 4.5 Z' fill='%23854d0e' fill-opacity='0.6'/%3E%3Cpath d='M3 7.5 C 25 5.5, 68 6, 96.5 5 C 97.5 12.5, 95 18, 97 20 C 70 21.5, 28 19.5, 4 19.5 Z' fill='%23a16207' fill-opacity='0.5'/%3E%3C/svg%3E");
}

/* Рукописный шрифт */
.handwriting {
  font-family: var(--font-hand);
  line-height: 1.1;
}

/* Ползунок температуры/диапазона */
input[type="range"].range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--color-paper-border-dark);
  border-radius: 3px;
  outline: none;
  transition: background 0.15s ease;
}
input[type="range"].range-slider:focus-visible {
  outline: 2px solid var(--color-accent) !important;
  outline-offset: 4px !important;
}
input[type="range"].range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  border: 2px solid var(--color-paper);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  transition: transform 0.1s ease;
}
input[type="range"].range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Сетки верстака */
.tool-two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (min-width: 900px) {
  .tool-two-col {
    grid-template-columns: 1.25fr 1fr;
  }
}

/* ==========================================================================
   5. МОБИЛЬНАЯ ПАНЕЛЬ И МОДАЛКА ПОИСКА
   ========================================================================== */

.mobile-quick-bar {
  display: none !important;
}
@media (max-width: 768px) {
  .mobile-quick-bar {
    display: flex !important;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 40;
    background-color: var(--color-paper);
    border-top: 1px solid var(--color-paper-border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
    padding: 0.25rem 0.5rem;
    align-items: center;
    justify-content: space-around;
  }
}
@media (max-width: 768px) {
  header nav.nav {
    display: none !important;
  }
}

/* ==========================================================================
   Header & Footer Canonical Surfaces
   ========================================================================== */
header,
.header {
  background-color: rgba(255, 255, 255, 0.96) !important;
  border-bottom: 1px solid var(--color-paper-border) !important;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

html.dark header,
html.dark .header {
  background-color: rgba(17, 24, 39, 0.96) !important;
  border-bottom: 1px solid var(--color-paper-border) !important;
}

footer,
.footer {
  background-color: var(--color-paper) !important;
  border-top: 1px solid var(--color-paper-border) !important;
}

#search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  z-index: 100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 5rem 1rem 2rem;
  background-color: rgba(20, 20, 20, 0.65);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
#search-modal.active {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
}
#search-modal-box {
  width: 100%;
  max-width: 680px;
  background-color: var(--color-paper);
  border: 1.5px solid var(--color-paper-border-dark);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  transform: translateY(-12px) scale(0.98);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
#search-modal.active #search-modal-box {
  transform: translateY(0) scale(1);
}

/* ==========================================================================
   6. СТИЛИ ПЕЧАТИ
   ========================================================================== */
@media print {
  header, footer, aside, .mobile-quick-bar, #search-modal, #theme-toggle, .no-print {
    display: none !important;
  }
  body, html {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt !important;
    line-height: 1.5 !important;
  }
  a {
    color: #000000 !important;
    text-decoration: underline !important;
  }
}

/* ==========================================================================
   7. СЕМАНТИЧЕСКИЕ АКЦЕНТ-УТИЛИТЫ (ACCENT BRIDGE)
   ========================================================================== */
.bg-accent {
  background-color: var(--color-accent) !important;
  color: #ffffff !important;
}
.bg-accent:hover,
.hover\:bg-accent-hover:hover {
  background-color: var(--color-accent-hover) !important;
}
.text-accent {
  color: var(--color-accent) !important;
}
.border-accent {
  border-color: var(--color-accent) !important;
}
.border-accent-subtle {
  border-color: var(--color-accent-border) !important;
}

/* ==========================================================================
   8. ИНЖЕНЕРНЫЕ СКЕТЧ-ЭЛЕМЕНТЫ (STICKERS, WASHI TAPE, CORNERS)
   ========================================================================== */
.sketch-card {
  position: relative;
  background-color: var(--color-card);
  border: 1px solid var(--color-paper-border);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-md);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.sketch-card:hover {
  border-color: var(--color-ink-muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card-hover);
}

html.dark .sketch-card {
  border-color: var(--color-paper-border);
  box-shadow: var(--shadow-card);
}

html.dark .sketch-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
}

.sketch-sticky-note {
  position: relative;
  background-color: var(--color-sketch-yellow-bg);
  border: 1px solid var(--color-sketch-yellow);
  border-radius: var(--radius-md);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transform: rotate(-0.8deg);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

html.dark .sketch-sticky-note {
  background-color: var(--color-sketch-yellow-bg);
  border-color: rgba(202, 138, 4, 0.45);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Инженерный полупрозрачный скотч */
.sketch-washi-tape,
.washi-tape {
  position: absolute;
  width: 84px;
  height: 18px;
  background-color: var(--color-sketch-tape);
  border-left: 2px dashed rgba(200, 185, 145, 0.8);
  border-right: 2px dashed rgba(200, 185, 145, 0.8);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  pointer-events: none;
  z-index: 20;
  opacity: 0.92;
}

html.dark .sketch-washi-tape,
html.dark .washi-tape {
  background-color: var(--color-sketch-tape);
  border-left-color: rgba(140, 125, 85, 0.6);
  border-right-color: rgba(140, 125, 85, 0.6);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Загнутый уголок стикера (фиксированное позиционирование в правом нижнем углу) */
.sketch-corner-fold {
  position: absolute !important;
  bottom: 0 !important;
  right: 0 !important;
  width: 24px !important;
  height: 24px !important;
  pointer-events: none !important;
  z-index: 10 !important;
}

.sketch-corner-shadow {
  fill: rgba(0, 0, 0, 0.08) !important;
}

html.dark .sketch-corner-shadow {
  fill: rgba(0, 0, 0, 0.4) !important;
}

.sketch-corner-triangle {
  fill: #fef08a !important;
  stroke: none;
}

html.dark .sketch-corner-triangle {
  fill: #ca8a04 !important;
}

.sketch-corner-crease {
  stroke: #eab308 !important;
  stroke-width: 0.9px !important;
  fill: none;
}

html.dark .sketch-corner-crease {
  stroke: rgba(202, 138, 4, 0.8) !important;
}

/* Карандашная штриховка в лабораторном блокноте (белая бумага + текстура оранжевого карандаша) */
.sketch-pencil-orange {
  background-color: var(--color-paper);
  background-image: 
    repeating-linear-gradient(
      -48deg,
      rgba(235, 82, 17, 0.12) 0px,
      rgba(235, 82, 17, 0.12) 1.5px,
      transparent 1.5px,
      transparent 5.5px
    ),
    repeating-linear-gradient(
      -44deg,
      rgba(255, 120, 40, 0.06) 0px,
      rgba(255, 120, 40, 0.06) 2px,
      transparent 2px,
      transparent 9px
    ),
    radial-gradient(
      ellipse at 35% 50%,
      rgba(255, 107, 43, 0.08) 0%,
      rgba(255, 107, 43, 0.02) 65%,
      transparent 100%
    );
  border: 1px solid var(--color-paper-border);
  border-left: 3px solid var(--color-accent);
}

html.dark .sketch-pencil-orange {
  background-color: var(--color-paper);
  background-image: 
    repeating-linear-gradient(
      -48deg,
      rgba(249, 115, 22, 0.14) 0px,
      rgba(249, 115, 22, 0.14) 1.5px,
      transparent 1.5px,
      transparent 5.5px
    ),
    radial-gradient(
      ellipse at 35% 50%,
      rgba(249, 115, 22, 0.10) 0%,
      transparent 100%
    );
  border-color: var(--color-paper-border);
  border-left-color: var(--color-accent);
}

/* Круглый скетч-бейдж для иконок (лабораторный поверочный штамп) */
.sketch-icon-badge {
  width: 50px;
  height: 50px;
  border-radius: 9999px;
  background-color: var(--color-sketch-yellow-bg);
  border: 1.5px dashed var(--color-sketch-yellow);
  box-shadow: inset 0 0 0 2px rgba(254, 240, 138, 0.4), 0 1px 3px rgba(0, 0, 0, 0.05);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
  transform: rotate(-1.5deg);
  transition: transform 0.2s ease;
}

.sketch-icon-badge:hover {
  transform: rotate(0deg) scale(1.04);
}

html.dark .sketch-icon-badge {
  background-color: rgba(202, 138, 4, 0.18);
  border-color: rgba(202, 138, 4, 0.55);
  box-shadow: inset 0 0 0 2px rgba(202, 138, 4, 0.2), 0 2px 6px rgba(0, 0, 0, 0.25);
  color: #f59e0b;
}

/* Разделитель на бумаге стикера */
.sketch-divider {
  border-color: rgba(253, 224, 71, 0.65) !important;
}

html.dark .sketch-divider {
  border-color: rgba(202, 138, 4, 0.4) !important;
}

/* Внутренняя плашка подсказки на стикере */
.sketch-tip-box {
  background-color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(253, 224, 71, 0.7);
  border-radius: var(--radius-sm);
}

html.dark .sketch-tip-box {
  background-color: rgba(20, 18, 14, 0.6);
  border-color: rgba(202, 138, 4, 0.4);
}

/* Плашка предупреждения на стикере */
.sketch-warn-box {
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
}

html.dark .sketch-warn-box {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: #fef08a;
}

/* Оранжевая статусная скетч-плашка (Caution Alert) */
.box-caution-orange {
  position: relative;
  background-color: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
}

html.dark .box-caution-orange {
  background-color: rgba(232, 93, 28, 0.15);
  border-color: rgba(232, 93, 28, 0.4);
  color: var(--color-ink);
}

/* Алиасы для обратной совместимости старых классов */
.sticker-yellow {
  position: relative;
  background-color: var(--color-sketch-yellow-bg);
  border: 1px solid var(--color-sketch-yellow);
  border-radius: var(--radius-md);
  color: var(--color-ink);
}

html.dark .sticker-yellow {
  background-color: var(--color-sketch-yellow-bg);
  border-color: rgba(202, 138, 4, 0.45);
}

.tape-strip,
.tape-yellow {
  position: absolute;
  height: 16px;
  background-color: var(--color-sketch-tape);
  border-left: 2px dashed rgba(200, 185, 145, 0.8);
  border-right: 2px dashed rgba(200, 185, 145, 0.8);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  pointer-events: none;
  z-index: 20;
  opacity: 0.92;
}

html.dark .tape-strip,
html.dark .tape-yellow {
  background-color: var(--color-sketch-tape);
  border-left-color: rgba(140, 125, 85, 0.6);
  border-right-color: rgba(140, 125, 85, 0.6);
}

/* Hero Layout & Task Grid */
.hero-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 992px) {
  .hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.95fr);
    gap: 2.5rem;
    align-items: center;
  }
}

.hero-tasks-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 580px) {
  .hero-tasks-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* WCAG Accessibility Utilities */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border-width: 0 !important;
}

.focus\:not-sr-only:focus,
.focus-not-sr-only:focus {
  position: fixed !important;
  width: auto !important;
  height: auto !important;
  padding: 0.5rem 1rem !important;
  margin: 0 !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
  z-index: 9999 !important;
}